Wallach's Interpretation of Diagnostic Tests: Pathways to Arriving at a Clinical Diagnosis (327 page)

   Protozoan infections (e.g., malaria, kala-azar, trypanosomiasis)

   Some rickettsial infections (e.g., Rocky Mountain spotted fever, typhus)

   Certain bacterial infections (e.g., bacterial endocarditis, TB, syphilis, brucellosis)

   Ulcerative colitis, regional enteritis, sprue

   Sarcoidosis and other connective tissue diseases (e.g., SLE, RA)

   Tetrachloroethane poisoning

   Chronic corticosteroid therapy

   Acute minor viral infections (counts should be rechecked in 1 month)

   Diurnal variations

EOSINOPHILIA

   Definition

Eosinophil count of >600/μL or >8% of the differential count. Eosinophilia may be primary (clonal), reactive, or idiopathic.

   Associated Conditions

   
Primary

   Hematologic: hypereosinophilic syndrome

   Neoplastic disorders: chronic eosinophilic leukemia, myelomonocytic leukemia with inversion 16 mastocytosis, and T-cell lymphomas that secrete interleukin-5